| wdenk | 7539dea | 2003-06-19 23:01:32 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2000-2003 |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | #include <status_led.h> |
| 26 | |
| 27 | /* |
| 28 | * The purpose of this code is to signal the operational status of a |
| 29 | * target which usually boots over the network; while running in |
| 30 | * U-Boot, a status LED is blinking. As soon as a valid BOOTP reply |
| 31 | * message has been received, the LED is turned off. The Linux |
| 32 | * kernel, once it is running, will start blinking the LED again, |
| 33 | * with another frequency. |
| 34 | */ |
| 35 | |
| 36 | /* ------------------------------------------------------------------------- */ |
| 37 | |
| wdenk | 7539dea | 2003-06-19 23:01:32 +0000 | [diff] [blame] | 38 | typedef struct { |
| 39 | led_id_t mask; |
| 40 | int state; |
| 41 | int period; |
| 42 | int cnt; |
| 43 | } led_dev_t; |
| 44 | |
| 45 | led_dev_t led_dev[] = { |
| 46 | { STATUS_LED_BIT, |
| 47 | STATUS_LED_STATE, |
| 48 | STATUS_LED_PERIOD, |
| 49 | 0, |
| 50 | }, |
| 51 | #if defined(STATUS_LED_BIT1) |
| 52 | { STATUS_LED_BIT1, |
| 53 | STATUS_LED_STATE1, |
| 54 | STATUS_LED_PERIOD1, |
| 55 | 0, |
| 56 | }, |
| 57 | #endif |
| 58 | #if defined(STATUS_LED_BIT2) |
| 59 | { STATUS_LED_BIT2, |
| 60 | STATUS_LED_STATE2, |
| 61 | STATUS_LED_PERIOD2, |
| 62 | 0, |
| 63 | }, |
| 64 | #endif |
| 65 | #if defined(STATUS_LED_BIT3) |
| 66 | { STATUS_LED_BIT3, |
| 67 | STATUS_LED_STATE3, |
| 68 | STATUS_LED_PERIOD3, |
| 69 | 0, |
| 70 | }, |
| 71 | #endif |
| 72 | }; |
| 73 | |
| 74 | #define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t)) |
| 75 | |
| 76 | static int status_led_init_done = 0; |
| 77 | |
| 78 | static void status_led_init (void) |
| 79 | { |
| 80 | led_dev_t *ld; |
| 81 | int i; |
| 82 | |
| 83 | for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) |
| 84 | __led_init (ld->mask, ld->state); |
| 85 | status_led_init_done = 1; |
| 86 | } |
| 87 | |
| 88 | void status_led_tick (ulong timestamp) |
| 89 | { |
| 90 | led_dev_t *ld; |
| 91 | int i; |
| 92 | |
| 93 | if (!status_led_init_done) |
| 94 | status_led_init (); |
| 95 | |
| 96 | for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) { |
| 97 | |
| 98 | if (ld->state != STATUS_LED_BLINKING) |
| 99 | continue; |
| 100 | |
| 101 | if (++ld->cnt >= ld->period) { |
| 102 | __led_toggle (ld->mask); |
| 103 | ld->cnt -= ld->period; |
| 104 | } |
| 105 | |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | void status_led_set (int led, int state) |
| 110 | { |
| 111 | led_dev_t *ld; |
| 112 | |
| 113 | if (led < 0 || led >= MAX_LED_DEV) |
| 114 | return; |
| 115 | |
| 116 | if (!status_led_init_done) |
| 117 | status_led_init (); |
| 118 | |
| 119 | ld = &led_dev[led]; |
| 120 | |
| 121 | ld->state = state; |
| 122 | if (state == STATUS_LED_BLINKING) { |
| 123 | ld->cnt = 0; /* always start with full period */ |
| 124 | state = STATUS_LED_ON; /* always start with LED _ON_ */ |
| 125 | } |
| 126 | __led_set (ld->mask, state); |
| 127 | } |